Ignition carry-over



June 4, 1963 H. c. LOHMAN IGNITION CARRY-OVER Filed Oct. 2, 1961 I I BaOOOQDDDI FIG! FIG.4

FIG.2

FIG.5

N RA 0M H N 0 mi c Y R R A H ATTORNEYS Patented June 4, 1963 3,092,169IGNITION CARRY-OVER Harry C. Lehman, La Crosse, Wis., assignor to TheTrane Company, La Crosse, Wis., a corporation of Wisconsin Filed Oct. 2,1961, Ser. No. 142,280 Claims. (Cl. 158-115) This invention relatesgenerally to gas burners and more particularly to a new and improvedignition carryover for ignition of a plurality of gas burners from asingle pilot flame.

An object of the invention is to provide a new and novel ignitioncarry-over which is inexpensive to produce and can be readily assembledto a plurality of gas burners.

Another object of the invention is to provide a new and novel ignitioncarry-over which cooperates with a single pilot flame to ignite aplurality of gas burners.

A third object of the invention is to provide an ignition carry-over inwhich the openings, left after punching out the supporting means, areemployed to receive gas from a plurality of gas burners to provide asource of fuel for ignition of the gas burners.

A further object of the invention is to provide a pilot burner andignition carry-over structure which cooperates to form an inexpensiveand eflicient ignition means for a plurality of gas burners.

Other objects and advantages of my invention will be clearly apparent asthe specification proceeds to describe the invention with reference tothe accompanying drawings, in which,

FIGURE 1 is a plan view of my ignition carry-over in operativerelationship to a plurality of gas burners;

FIGURE 2 is a front elevation view of the gas burners and ignitioncarry-over of FIGURE 1 shown in relation to the pilot burner and heatexchanger;

FIGURE 3 is a side view of one of the burners shown in FIGURE 1 with aportion broken away;

FIGURE 4 is a bottom view of my new and improved ignition carry-over;

FIGURE 5 is a cross-sectional view showing the pilot burner in relationto the ignition carry-over;

FIGURE 6 is a cross-sectional view taken on line 6-6 of FIGURE 4; and

FIGURE 7 is a view similar to FIGURE 6 showing a modification of theignition carry-over.

Looking now more particularly to FIGURES 1 and 2, a typical gas burnerarrangement is shown. Gaseous fuel from manifold 10 is delivered to aplurality of corrugated ribbon type sheet metal burners 12 locatedsubstantially parallel to one another. To ignite the delivered gaseousfuel, an ignition carry-over 14 is provided to ignite the burners 12from pilot burner 16.

Gas burners 12 have the conventional spud receiving opening 18 in theend of the mixing bell 20. Conventional shutters 22 are provided toregulate the amount of air mixed with the gaseous fuel. Metal ribbons 23of any desired shape or configuration are located in the outlet opening24 adjacent the mixing chamber 25 of the burner 12. A scoop 27 isprovided in each burner 12 to direct a portion of the air-gas mixtureinto my new and improved ignition carry-over.

Ignition carry-over 14 consists of an upper sheet metal member 26 spotwelded or otherwise secured to lower sheet metal member 28. Lower sheetmetal member is shaped to cooperate with upper sheet metal member 26 toform an elongated opening or flame port 30 which is adjacent both thepilot member 16 and burners 12. Tab members 32 are punched out of lowersheet metal member 28 at predetermined positions so that tabs 32 may besecured in burner outlet opening 24 between ribbons 23 and the rear ofoutlet opening 24 to position aperture 34,

left from the formation of tabs 32, over the appropriate burner in orderto receive a gas-air mixture therefrom. The ends 36 and 38 of ignitioncarry-over 14 are formed upwardly from lower sheet metal member 28 toclose the ends of gas receiving channel 40.

A pilot burner bracket 42 is employed to support pilot burner 16approximately midway between two of gas burners 12. Pilot burner bracketis secured on one side 45 to heat exchanger 44 by screws 46, or anyother suitable means. The other side 48 of pilot burner bracket 42 isshaped to conform to the ignition carry-over 14 and is welded orotherwise secured to same in order to provide positive location of thepilot burner in relation to ignition carry-over 14.

In operation, gas is fed into burners 12 through manifold 10 where it ismixed with primary air. A portion of this gas is diverted by scoops 27through opening 34 of ignition carry-over 14 into the gas receivingchannel 40. This gas-air mixture is then ignited by pilot burner 16 andtravels down flame port 30 and in turn ignites each of the burners 12.

In the modification of FIGURE 7 ignition carry-over has both the uppermember 260 and the lower member 280 triangularly shaped in order to forma downwardly diverted flame port 300 in order to direct the ignitionflame directly to the gas burners 12. As in the embodiment of FIGURESl6, tab members 320 are snugly positioned in the ends of the gas burnerto locate openings 340 over the respective burners in order to receive agas-air mixture for ignition purposes.

My new and novel ignition carry-over structure provides positivelocation of the ignition carry-over to the burners with a minimum ofmanufacturing and assembly. The formation of tabs 32 or 320 provide apositive locating means for the ignition carry-over as well as providingat the same time an opening for the passage of an air-gas mixture forthe purpose of ignition.

Although I have described in detail the preferred embodiments of myinvention, I contemplate that many changes may be made without departingfrom the scope or spirit of my invention, and I desire to be limitedonly by the claims.

I claim:

1. A gas fired apparatus comprising: a plurality of elongated gasburners, said gas burners being substantially parallel to one another,means forming an inlet opening and an outlet opening in each of saidburners, a ribbon type burner element in each of said outlets, manifoldmeans connected to each of said inlet openings to supply gaseous fuelthereto, an ignition carry-over operably associated with said burners toignite a gaseous fuel issuing from said outlets, said ignitioncarry-over having tab means formed outwardly therefrom and leavingopenings in said ignition carry-over, said tab means being secured tosaid burners adjacent said ribbon type burner element, said openingsbeing located over a portion of said outlets to receive gaseous fueltherefrom, scoop means secured in each of said burners adjacent saidopenings to divert gaseous fuel into said ignition carry over, saidignition carry-over having a flame port adjacent said outlets, and meanssupporting a pilot burner adjacent said flame port to ignite gaseousfuel therefrom and thereby produce an ignition flame for said burners.

2. A gas fired apparatus comprising: a plurality of elongated gasburners, said gas burners being substantially parallel to one another,means forming an inlet opening and an outlet opening in each of saidburners, manifold means connected to each of said inlet openings tosupply gaseous fuel thereto, an ignition carry-over operably associatedwith said burners to ignite a gaseous fuel issuing from said outlets,said ignition carry-over having tab means formed outwardly therefrom andleaving openings in said ignition carry-over, said tab means beingsecured to said burners, said openings being located over a portion ofsaid outlets to receive gaseous fuel therefrom, scoop means secured ineach of said burners adjacent said openings to divert gaseous fuel intosaid ignition carryover, said ignition carry-over having a flame portadjacent said outlets, and means supporting a pilot burner adjacent saidflame port to ignite gaseous fuel therefrom and thereby produce anignition flame for said burners.

3. A gas fired apparatus comprising: a plurality of elongated gasburners in spaced substantially parallel relation, each of said burnershaving an inlet and an elongated outlet, manifold means connected toeach of said inlets to supply gaseous fuel thereto, an elongatedignition carry-over means traversing said burners at an angle thereto,said elongated ignition carry-over means being comprised of an elongatedupper sheet metal member, a lower elongated sheet metal member, meanssealingly securing the margin adjacent a first side of said upper memberto the margin adjacent a first side of said lower member along thelongitudinal length thereof, the margin adjacent a second side of saidupper member being disposed in close spaced relation to an upwardlyextending margin adjacent the second side of said lower member forming aflame port therebetween extending longitudinally with respect to saidupper and lower members, the middle portions of said membersintermediate said first and second sides being in spaced relationproviding a gas conducting passage therebetween, said last mentionedspatial relationship being of greater magnitude than the spatialrelationship between the margins adjacent the second sides of saidmembers, said middle portion of said lower sheet metal member havingtabs formed therefrom and extending outwardly of said gas conductingpassage and leaving inlet apertures to said gas conducting passageremote from said flame port, each of said tabs being secured to one ofsaid elongated gas burners, said inlet apertures being located over aportion of said burner outlets for receiving gas therefrom, and a pilotburner located adjacent said flame port for igniting gaseous fuelissuing therefrom.

4. A gas fired apparatus comprising: a plurality of elongated gasburners in spaced substantially parallel relationship, each of saidburners having an inlet and an elongated outlet, manifold meansconnected to each of said inlets to supply gaseous fuel thereto, anelongated ignition carry-over means traversing said burners at an anglethereto, said elongated ignition carry-over including an elongatedchannel member having an upper portion and a lower portion, said upperand lower portions being in spaced relationship forming a gas carryingpassage there- Cir between, said upper portion having a longitudinallyextending margin in close spaced relation to an upwardly extendinglongitudinally extending margin of said lower portion formingtherebetween an elongated flame port, said lower portion having aplurality of tabs formed therefrom remote from said upwardly extendingmargin member remote from said flame port, said tabs being seleaving aplurality of gas inlet apertures in said channel cured to said burnersand said inlet apertures being located over a portion of said outlets ofsaid burners to receive gaseous fuel therefrom, and a pilot burnerlocated adjacent said flame port for igniting gaseous fuel issuingtherefrom.

5. A gas fired apparatus comprising: a plurality of elongated gasburners, said gas burners being substantially parallel to one another,means forming an inlet opening and an elongated outlet opening in eachof said burners, manifold means connected to each of said inlet openingsfor supplying gaseous fuel thereto, an elongated ignition carry-overextending substantially normal to said burners and operably associatedwith said burners to ignite a gaseous fuel issuing from said outlets,said elongated ignition carry-over including an elongated channel memberhaving an upper portion and a lower portion, said upper and lowerportions being in spaced relation forming a gas carrying passagetherebetween, said upper portion having a longitudinally extendingmargin in close spaced relation to an upwardly extending longitudinalmargin of said lower portion forming therebetween an elongated flameport, said lower portion having a plurality of tabs formed therefromremote from said upwardly extending margin leaving a plurality of gasinlet apertures in said channel members remote from said margins, saidtabs being removably secured to said burners and said inlet aperturesbeing disposed over a portion of said outlets of said burners to receivegaseous fuel therefrom, a heat exchanger located adjacent said burnersand a pilot burner mounting permanently connected to said carry-over andremovably secured to said heat exchanger whereby said carry-over and apilot burner may be removed as a unit Without introducing spatialchanges between the pilot burner and said carry-over.

References Cited in the file of this patent UNITED STATES PATENTS1,072,349 Mott Sept. 2, 1913 2,057,193 Iedeka Oct. 13, 1936 2,541,428Leo Feb. 13, 1951 2,652,107 Hughes Sept. 15, 1953 2,818,059 Cayot Dec.31, 1957 2,993,534 Greiner et a1. July 25, 1961

2. A GAS FIRED APPARATUS COMPRISING: A PLURALITY OF ELONGATED GASBURNERS, SAID GAS BURNERS BEING SUBSTANTIALLY PARALLEL TO ONE ANOTHER,MEANS FORMING AN INLET OPENING AND AN OUTLET OPENING IN EACH OF SAIDBURNERS, MANIFOLD MEANS CONNECTED TO EACH OF SAID INLET OPENINGS TOSUPPLY GASEOUS FUEL THERETO, AN IGNITION CARRY-ON OPERABLY ASSOCIATEDWITH SAID BURNERS TO IGNITE A GASEOUS FUEL ISSUING FROM SAID OUTLETS,SAID IGNITION CARRY-OVER HAVING TAB MEANS FORMED OUTWARDLY THEREFORM ANDLEAVING OPENINGS IN SAID IGNITION CARRY-OVER, SAID LAB MEANS BEINGSECURED TO SAID BURNERS, SAID OPENINGS BEING LOCATED OVER A PORTION OFSAID OUTLETS TO RECEIVE GASEOUS FUEL THEREFROM, SCOOP MEANS SECURED INEACH OF SAID BURNERS ADJACENT SAID OPENINGS TO DIVERT GASEOUS FUEL INTOSAID IGNITION CARRYOVER, SAID IGNITION CARRY-OVER HAVING A FLAME PORTADJACENT SAID OUTLETS, AND MEANS SUPPORTING A PILOT BURNER ADJACENT SAIDFLAME PORT OF IGNITE GASEOUS FUEL THEREFORM AND THEREBY PRODUCE ANIGNITION FLAME FOR SAID BURNERS.